Die set



May 6, 1930. K. JANISZEWSKI V ,7

DIE SET Filed Dec. 15, 1926 (MHz 72.55:

reference character 10 Patented May 6, 1930 UNITED STATES ra'rnN'r caries KASIMIR JANISZEV] SKI, OIE MILWAUKEE, WISCONSIN, ASSIGNOR TO SUPERIOR TOOL AND DIE COMPANY. OF MILWAUKEE, WISCONSIN, A CORPORATION OF WISCONSIN DIE SET Application filed December 15, 1926. Serial No. 154,991.

My invention relates to die sets and has among its other objects the production of de vices of the kind described which are convenient, durable, efficient and satisfactory for use wherever found applicable.

A particular object of the invention is to provide improved construction for appara tus comprising a reciprocating part, which construction will insure that the bearing surfaces of the reciprocating part will be properly lubricated.

Another particular object of theinvention is to provide improved means for lubricating the bearing surfaces of the leader or liner pins of a die set.

Many other objects and advantages of the construction herein shown and described will be obvious to those skilled in the art from the disclosure herein given.

To this end my invention consists in the novel construction, arrangement and combination of parts herein shown and described, and more particularly pointed out in the claim.

In the drawing, wherein like reference characters indicate like or corresponding carts: 1 Fig. 1 is a plan view of a die set embodying the invention;

Fig. 2 is a section taken on line 2-2 of Fig. l; and

Fig. 3 is a section taken on line 3-3 of Fig. 2.

Referring to the drawing, wherein I have shown a die set embodying the invention, the designates the punch holder of the die set and the reference character 11 designates the die shoe thereof. The punch holder 10 and die shoe 11 may be formed of any suitable material and may be of any suitable design. In the preferred embodiments of the invention the punch holder and die shoe are formed of cast iron.

Projecting upwardly from and rigidly secured to the die shoe 11 are a plurality of guide or leader pins 13 upon which the punch holder 10 is adapted to reciprocate. In the illustrated embodiment of the invention, the punch holder 10 is provided with steel bushings 15 slidably engaging the leader pins 13,

but it is to be understood that in many instances I intend to dispense with the bushings 15 and simply provide bores in the punch holder 10 for slidably mounting it upon the leader pins.

The die shoe 11 is adapted to be secured to the bolster-plate or the equivalent of a punch press, and the punch holder 10 is adapted to be operatively secured to the punch of the press, the punch holder being provided with an upwardly projecting member 17 for this purpose. As well known to those skilled in the art when the die set is assembled with a press in the manner described, the die punch and the die itself may be secured to the punch holder and the die shoe, respectively, and the press may be operated to manufacture accurate punchings, the leader pins 13 functioning to keep the die punch in accurate alignment with the die itself.

As best shown in Figs. 2 and 3, the leader pins 13 are provided with a plurality of circumferential grooves 18 which incline downward from the cylindrical toward the longitudinal axes thereof to form annular pockets 19 adapted to hold lubricating oil. It will be noted, as shown in Fig. 3, that at the lower portion of the inclined wall of each roove 18 the wall curves on an are to form a substantially arcuate-shaped pocket which extends below the outer wall of the groove, thus forming a substantial pocket in which the lubricant is retained. lVhen the apparatus is in use, the lubricating oil is fed to the cylindrical surfaces of the pins through capillary attraction and by reason of the vibration of the press. This, of course, insures that the bearing surfaces of the leader pins and the bushings 15 will be properly lubricated and that there will be a minimum of wear between these parts. It will be noted that the grooves 18 are so formed that lubricant will be retained in the pockets 19 even when the die set is assembled in connection with a tical.

Having thus described my invention, it is obvious that various immaterial modifications may be made in the same without depress adjusted at an angle to the versurfaces of the pins p arting from the spirit of fny invention;

hence I do not Wish to be understood as limiting myself to the exact form, construction, arrangement and combination of parts herein shown and described or uses mentioned.

What I claim as new and desire to securev by Letters Patent is:

A die set comprising a punch holder, a die shoe, and non-perforated leader pins carried by the .die shoefor slidably journaling the punch holder, said leader :pins being provided with inwardly and downwardly eX- tending annular pockets for holding a lubricant for the bearing surfaces of the pinsland the holder.

. In testimony whereof, I have hereunto signed my name.

KAS'IMIR JANISZEWSKI. 

